George Bancroft

Capt. Leeds

Slim Summerville

Ellsworth 'Spuds' Fickett, cook

J. Farrell MacDonald

CWO 'Sails' Quincannon

Warren Hymer

Seaman Rocky Haggerty

Douglas Fowley

Seaman Pinky Brett

Dick Hogan

Seaman Johnny Miller

Elisha Cook Jr.

Seaman Rutherford Davis Pratt, aka 'The Professor'

George E. Stone

Seaman Irving Goldfarb

John Carradine

McAllison

Ward Bond

Seaman Olaf Swanson

Moroni Olsen

The Fleet Captain

Charles Trowbridge

RAdm. Joseph Maitland

Maxie Rosenbloom

Marine Sentry Sgt. Joe Duffy

Joan Valerie

Anne

Henry Armetta

Luigi

Jack Pennick

Bos'un 'Guns' McPeek

Robert Lowery

Sparks, radioman

Harry Strang

Seaman Grainger

Victor Varconi

Italian Naval Chaplain Vanzano

Russ Clark

Undetermined Part (script name, Anderson)

Charles Tannen

Undetermined Part (script name, Kelly)

Ernie Alexander

Warship Sailor

Murray Alper

Orderly in Maitland's Office

Lon Chaney Jr.

Marine Sentry

Dorothy Christy

McPeek's Girl

E. E. Clive

Ray Cooke

Warship Sailor

Alan Davis

Maitland's Secretary-Lieutenant

Duke Green

Warship Sailor

Fred Malatesta

Italian Gendarme at the 'Maria Ann'

Frank Moran

Waiter at Dive

Manuel París

Italian Gendarme at the 'Maria Ann'

Ferdinand Schumann-Heink

German Officer

Dick Wessel

Dock Shore Patrolman (facing camera)

Max Wagner

Marine Corporal (uncredited)

Harry Tenbrook

Sailor (uncredited)

Hans Schwimmer

Minor Role (uncredited)